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code hashes verified before execution. Unmodified simulator b244530ee2a6247b5f930830eeca9dd950da0e7e; default ChallengeConfig and ParameterVariance, 2000 steps, serial in one interpreter, no sandbox. Each measurement (seed,strategy) executed once. Four separate incumbent reference checks passed. Statistics use unrounded differences; seconds_per_simulation is mean engine runtime over measurement runs only. This block alone does not establish promotion."}